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Advanced hydrogen storage of the mg–Na–Al system:A review

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Journal of magnesium and Alloys 2021年第4期9卷 1111-1123页

作者： N.A.Ali m.ismail Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

A solid-state storage system is the most practical option for hydrogen because it is more convenient and *** hydrides,especially mgH_(2),are the most promising materials that offer high gravimetric capacity and good ***,the practical application of mgH_(2) is restricted by slow sorption kinetics and high stability of thermodynamic *** storage performance of mgH_(2) was enhanced by introducing the mg–Na–Al system that destabilises mgH_(2) with NaAlH_(4).The mg–Na–Al system has superior performance compared to that of unary mgH_(2) and NaAlH_(4).To boost the performance of the mg–Na–Al system,the ball milling method and the addition of a catalyst were *** mg–Na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics *** Al_(12)mg_(17) and NamgH_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the mg–Na–Al system and alter the thermodynamic *** this paper,the overview of the recent progress in hydrogen storage of the mg–Na–Al system is *** remaining challenges and future development of mg–Na–Al system are also *** paper is the first review report on hydrogen storage properties of the mg–Na–Al system.

关键词： mg-Na-Al system mgH_(2) NaAlH_(4) Al_(12)mg_(17) hydrogen storage

Catalytic effect of SrTiO_3 on the hydrogen storage behaviour of mgH_2

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Journal of Energy Chemistry 2019年第1期28卷 46-53页

作者： m.S.Yahya m.ismail School of Ocean Engineering University Malaysia Terengganu

The effects of Sr TiO_3 on the hydrogen storage properties of mgH_2 have been studied for the first *** onset dehydrogenation temperature of the mgH_2-10 wt% SrTiO_3 is found to be 275 ℃, which is 55 ℃ lower as compared to the as-milled mgH_2. The composite is able to absorb 4.3 wt% of hydrogen in 60 min instead of 1.1 wt% for the as-milled mg H_2. meanwhile, the composite is able to release 5.3 wt% of hydrogen in 17 min compared to 1.9 wt% by the as-milled mg H_2 at 320 ℃. The calculated Eaof the mg H_2-10 wt% SrTiO_3 is 109 k J/mol, which is 26.3 kJ/mol lower than the calculated Eaof the as-milled mgH_2. The Sr TiO_3 is not decomposed during the ball milling and the re/dehydrogenation processes. The catalytic effect shown by the SrTiO_3 is owing to its ability to change the physical structure of the mgH_2 particles during the ball milling process.

关键词： Hydrogen storage magnesium hydride Catalytic effect Sorption properties

SARS-CoV-2 spike behavior in situ:a Cryo-Em images for a better understanding of the COVID-19 pandemic

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Signal Transduction and Targeted Therapy 2020年第1期5卷 326-327页

作者： Alaa m.ismail Abdo A.Elfiky Biophysics Department Faculty of SciencesCairo UniversityGizaEgypt

most recently in Nature Journal,Ke et *** investigate the SARS-CoV-2 spike in situ by using cryo-electron microscopy(Cryo-Em)to reveal its different conformations,orientations,and distribution over the virion particles.

关键词： particles thoroughly behavior

Islands of stability and quasi-magic numbers for super- and ultra-heavy nuclei

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Chinese Physics C 2016年第12期40卷 69-90页

作者： m.ismail A.Y.Ellithi A.Adel Hisham Anwer Physics Department Faculty of Science Cairo University Physics Department College of Science Majmaah University Physics Department German University in Cairo

In the framework of Strutinsky＇s approach, we calculated the shell and the residual pairing correction energies for 5569 even-even nuclei in the range 72 ≤ Z ≤ 282 and 96≤N ≤ 540. Quasi-magic numbers and deformed islands of stability that reside in a range defined by Green＇s formula and the two-neutrons drip line are introduced. We present 36 quasi-magic proton and 53 quasi-magic neutron magic numbers that contribute to the formation of 133 deformed islands of stability along the N-Z space. The quasi-magic proton and neutron magic numbers volatile as the mass number increases and other magic numbers take over. Consequently, the deformed islands of stability fail to exhibit a pattern along the search space covered.

关键词： deformed nuclei islands of stability magic numbers

Numerical and experimental analysis for simulating fuel reactor in chemical looping combustor system

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International Journal of Coal Science & Technology 2020年第3期7卷 551-559页

作者： Tamer m.ismail Lu Ding Khaled Ramzy mAbd El-Salam Department of mechanical Engineering Suez Canal UniversityIsmailiaEgypt Institute of Clean Coal Technology East China University of Science and TechnologyShanghai200237China Department of Basic Science Cairo UniversityGizaEgypt

The greenhouse problem has a significant effect on our communities such as,health and *** dioxide is one of the main gases that cause global ***,CO2 capture techniques have been the focus of attention these *** chemical looping combustion technique adopted the air reactor and fuel reactor to recycle heat *** study presents a numerical and experimental investigation on a fuel reactor in chemical looping combustor(CLC)*** present numerical model is introduced by the kinetic theory of granular flow and coupled with gas–solid flow with chemical reactions to simulate the combustion of solids in the *** k–εturbulent model was used to model the gas phase and the particle *** developed model simplify the prediction of flow patterns,particle velocities,gas velocities,and composition profiles of gas products and the distribution of heterogeneous reaction rates under the same operating *** predicted and experimental results were compared according to the basis of determination coefficient(R2).In addition the results showed that there is a good agreement between the predicted and experimental *** value of(R2)for CO,CO2 and CH4 was 0.959,0.925 and 0.969 *** shows that the present model is a promising simulation for solid particle combustion and gives the power direction for the design and optimization of the CLC systems.

关键词： Chemical looping combustion mathematical modeling Fluidized bed Coal Kinetic model

Ultrafast laser dynamics of metal organic frameworks/TiO_2 nano-arrays hybrid composites for energy conversion applications

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Journal of Energy Chemistry 2019年第2期28卷 88-94页

作者： Fatma m.ismail Daniel O'Neil Tareq Youssef Souad A.Elfeky The National Institute of Laser Enhanced Sciences Cairo University Zewail City of Science and Technology Georgia Institute of Technology

Herein,we report the victorious synthesis of metal-organic frameworks(mOFs) on TiO_2 nanotubes(NTs)using a layer-by-layer(LbL) *** crystalline and homogenous thin films of mOFs were grown and characterized using XRD,SEm,FT-IR and UV/Vis ***,the utilization of the mOF films as sensitizers was probed in bespoke Graetzel type liquid junction solar *** constructed cell performance revealed an I_(sc) of 1.16 mA cm^(–2),Vocof 0.63 V,FF of 0.33,and E_(ff) of 0.42%.Further,pumpprobe transient laser spectroscopy was performed to investigate the energy and charge transfer dynamics of the mOFs/TiO_2 NTs *** results indicated 86% injection *** ultrafast pump-probe spectroscopy allows the investigation of this process and the differences between *** also showed that the relaxation of the mOF chromophores is in competition with electron injection in the Ti O2 *** this study provides a new insight into electron transfer from photoexcited metal-organic frameworks(mOFs) into titanium dioxide.

关键词： Ultrafast laser dynamics metal-organic frameworks TiO2 nano-arrays Energy conversion Thin film

Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural Regeneration Research 2025年第5期20卷 1324-1335页

作者： Hassan saad Bachar El Baba Ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel Refai Gerald R.Rodts Christian mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow matthew F.Gary Ali m.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

Assembly of functional carboxymethyl cellulose/polyethylene oxide/anatase TiO_(2) nanocomposites and tuning the dielectric relaxation, optical, and photoluminescence performances

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Journal of Semiconductors 2024年第7期45卷 26-38页

作者： Asmaa m.ismail Abeer A.Reffaee Fawzy G.El Desouky Spectroscopy Department Physics Research InstituteNational Research CentreGizaCairo 12622Egypt microwave Physics and Dielectrics Department National Research CentreDokkiCairoEgypt Solid State Physics Department Physics Research InstituteNational Research CentreGizaCairo 12622Egypt

Nanocomposite films consisting of carboxymethyl cellulose,polyethylene oxide(CmC/PEO),and anatase titanium diox-ide(TO)were produced by the use of sol-gel and solution casting ***2 nanocrystals were effectively incorporated into CmC/PEO polymers,as shown by X-ray diffraction(XRD)and attenuated total reflectance fourier transform infrared(ATR-FTIR)*** roughness growth is at high levels of TO nanocrystals(TO NCs),which means increasing active sites and defects in CmC/*** differential scanning calorimetry(DSC)thermograms,the change in glass transition temperature(Tg)val-ues verifies that the polymer blend interacts with TO *** increment proportions of TO NCs have a notable impact on the dielectric performances of the nanocomposites,as *** electrical properties of the CmC/PEO/TO nanocomposite undergo significant *** nanocomposite films exhibit a red alteration in the absorption edge as the concentration of TO NCs increases in the polymer *** decline in the energy gap is readily apparent as the weight percentage of TO NCs *** photoluminescence(PL)emission spectra indicate that the sites of the luminescence peak maximums show slight variation;peaks get wider,while their intensities decrease dramatically as the concentration of TO *** nanocomposite materials show potential for multifunctional applications including optoelectronics,antireflection coatings,pho-tocatalysis,light emitting diodes,and solid polymer electrolytes.

关键词： anatase TiO_(2) CmC/PEO nanocomposites optical photoluminescent electrical optoelectronics

Inclusion of CoTiO_(3) to ameliorate the re/dehydrogenation properties of the mg–Na–Al system

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Journal of magnesium and Alloys 2024年第3期12卷 1215-1226页

作者： N.A.Ali N.Y.Yusnizam N.A.Sazelee Sami-ullah Rather Haizhen Liu m.ismail Energy Storage Research Group Faculty of Ocean Engineering TechnologyUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Chemical and materials Engineering King Abdulaziz UniversityP.O.Box80204Jeddah 21589Saudi Arabia Guangxi Novel Battery materials Research Center of Engineering Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Featured metal materials and Life-Cycle Safety for Composite Structures Nanning 530004China

For the first time,the mgH_(2)–NaAlH_(4)(ratio 4:1)destabilized system with CoTiO_(3) addition has been *** CoTiO_(3)-doped mgH_(2)–NaAlH_(4) sample begins to dehydrogenate at 130℃,which is declined by 40℃ compared to the undoped mgH_(2)–NaAlH_(4).moreover,the de/rehydrogenation kinetics characteristics of the CoTiO_(3)-doped mgH_(2)–NaAlH_(4) were greatly *** the inclusion of CoTiO_(3),the mgH_(2)–NaAlH_(4) composite absorbed 5.2 wt.%H_(2),higher than undoped mgH_(2)–NaAlH_(4).In the context of dehydrogenation,the CoTiO_(3)-doped mgH_(2)–NaAlH_(4) sample desorbed 2.6 wt.%H_(2),almost doubled compared to the amount of hydrogen desorbed from the undoped mgH_(2)–NaAlH_(4) *** activation energy obtained by the Kissinger analysis for mgH_(2) decomposition was significantly lower by 35.9 kJ/mol than the undoped mgH_(2)–NaAlH_(4) *** reaction mechanism demonstrated that new phases of mgCo and AlTi_(3) were generated in situ during the heating process and are likely to play a substantial catalytic function and be useful in ameliorating the de/rehydrogenation properties of the destabilized mgH_(2)–NaAlH_(4) system with the inclusion of CoTiO_(3).

关键词： Destabilize system magnesium hydride Sodium alanate Hydrogen storage Additive.